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nikitadnepr [17]

3 years ago

14

5 Which of the following must be transformed into electrical energy when biomass is used as an energy resource? * DS (20 Points)

A chemical energy B. mechanical energy O C. nuclear energy D. radiant energy

1 answer:

Lemur [1.5K]3 years ago

3 0

Answer:

nuclear energy

Explanation:

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The pressure difference, , across a partial blockage in an artery (called a stenosis) is approximated by the equation where is t

Strike441 [17]

The question is incomplete. The complete question is :

The pressure difference, Δp, ac $K_u$ ross a partial blockage in an artery (called a stenosis) is approximated by the equation :

$\Delta p=K_v\frac{\mu V}{D}+K_u\left(\frac{A_0}{A_1}-1\right)^2 \rho V^2$

Where V is the blood velocity, μ the blood viscosity {FT/L2}, ρ the blood density {M/L3}, D the artery diameter, $A_0$ the area of the unobstructed artery, and A1 the area of the stenosis. Determine the dimensions of the constants $K_v$ and $K_u$ . Would this equation be valid in any system of units?

Solution :

From the dimension homogeneity, we require :

$\Delta p=K_v\frac{\mu V}{D}+K_u\left(\frac{A_0}{A_1}-1\right)^2 \rho V^2$

Here, x means dimension of x. i.e.

$[ML^{-1}T^{-2}]=\frac{[K_v][ML^{-1}T^{-1}][LT^{-1}]}{[L]}+[K_u][1][ML^{-3}][L^2T^{-2}]$

$=[K_v][ML^{-1}T^{-2}]+[K_u][ML^{-1}T^{-2}]$

So, $[K_u]=[K_v]=[1 ]=$ dimensionless

So, $K_u$ and $K_v$ are dimensionless constants.

This equation will be working in any system of units. The constants $K_u$ and $K_v$ will be different for different system of units.

5 0

3 years ago

What are three ways a driver can cause a car to accelerate?

algol13

If you have to pick 3 answers then B, C, and D but if you pick only 1 answer then pick D

8 0

3 years ago

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Please help me plsss!

alexira [117]

Answer:

A

Explanation:

3 0

2 years ago

Which of the following lists contains only examples of renewable sources of energy?

anyanavicka [17]

<h3><u>Answer;</u></h3>

A. wind, tidal, geothermal, and hydroelectric

<h3><u>Explanation</u>;</h3>

Renewable energy sources are the energy sources that are constantly being replenished, such as sunlight, wind, and water. This means that we can use them as much as we want, and we do not have to worry about them running out.
Additionally, renewable energy sources are usually much more environmentally friendly than fossil fuels. Examples of renewable sources of energy includes; solar energy, wind energy, hydroelectric power, tidal energy, geothermal energy, etc.

5 0

3 years ago

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Determine the gravitational potential energy, in kJ, of 3 m3 of liquid water at an elevation of 40 m above the surface of Earth.

melomori [17]

Explanation:

We will calculate the gravitational potential energy as follows.

$P.E_{1} = mgz_{1}$

$P.E_{1} = (\rho V)gz_{1}$

= $1000 kg/m^{3} \times 3 m^{3} \times 9.7 \times 40 m$

= 1164000 J

or, = 1164 kJ (as 1 kJ = 1000 J)

Now, we will calculate the change in potential energy as follows.

$\Delta P.E = mg(z_{2} - z_{1})$

= $\rho \times V \times g (z_{2} - z_{1})$

= $1000 \times 3 \times 9.7 (10 - 40)m$

= -873000 J

or, = -873 kJ

Thus, we can conclude that change in gravitational potential energy is -873 kJ.

4 0

3 years ago